Question

Android Studio版本：3.4.1
Firebase组件：firebase-messaging：
组件版本：17.3.2

大家好，我将使用Firebase消息传递到androidx的应用程序迁移时遇到问题。我按照说明https://developer.android.com/jetpack/androidx/migrate

不幸的是，似乎Firebase组件尚未迁移

java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;
        at com.google.firebase.FirebaseApp.<clinit>(com.google.firebase:firebase-common@@17.1.0:101)
        at com.google.firebase.FirebaseApp.initializeApp(com.google.firebase:firebase-common@@17.1.0:244)
        at com.google.firebase.provider.FirebaseInitProvider.onCreate(com.google.firebase:firebase-common@@17.1.0:53)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1927)
        at android.content.ContentProvider.attachInfo(ContentProvider.java:1902)
        at com.google.firebase.provider.FirebaseInitProvider.attachInfo(com.google.firebase:firebase-common@@17.1.0:47)
        at android.app.ActivityThread.installProvider(ActivityThread.java:6578)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:6133)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6043)
        at android.app.ActivityThread.-wrap1(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1764)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.util.ArrayMap" on path: DexPathList

有什么解决方法吗？我认为通过添加以下方式可以神奇地解决该问题：

android.useAndroidX=true
android.enableJetifier=true

无论如何..我一无所知（因为FirebaseApp仍然保留了对v4支持库的旧依赖性）。我想念什么吗？感谢您的帮助。

build.gradle

compileSdkVersion 28
    buildToolsVersion "27.0.3"

    defaultConfig {
        minSdkVersion 21
        targetSdkVersion 28
        versionCode project.sdkVersionCode
        versionName project.sdkVersionName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

configurations.all { exclude group: 'com.android.support', module: 'support-v4'}
configurations.all { exclude group: 'com.android.support', module: 'support-compat'}
configurations.all { exclude group: 'com.android.support', module: 'support-annotations'}

dependencies {

    implementation 'androidx.core:core:1.0.2'
    implementation 'androidx.annotation:annotation:1.1.0'
    implementation 'com.google.code.gson:gson:2.8.2'
    implementation 'com.squareup.okhttp3:okhttp:3.9.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.9.0'
    implementation 'com.squareup.retrofit2:retrofit:2.3.0'
    implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava:2.0.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.0.0'
    implementation 'io.reactivex:rxandroid:1.2.0'
    implementation 'com.google.firebase:firebase-messaging:17.3.2'
    implementation 'com.google.firebase:firebase-common:17.1.0'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'androidx.appcompat:appcompat:1.1.0-beta01'
    implementation 'com.madgag.spongycastle:core:1.58.0.0'
    implementation('com.crashlytics.sdk.android:crashlytics:2.9.1@aar') {
        transitive = true
    }

    testImplementation 'junit:junit:4.12'
    testImplementation 'org.mockito:mockito-core:2.15.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Answer 1

我认为您缺少现在托管该文件的AndroidX Collections库：

https://developer.android.com/reference/androidx/collection/ArrayMap.html

implementation 'androidx.collection:collection:1.0.0'

Answer 2

我发现了一个问题，解决方案是将build gradle版本更新到至少3.2.0。这也是通过android studio自动迁移时所说的“ 将build gradle插件升级到至少3.2.0 ”

classpath 'com.android.tools.build:gradle:3.2.0'

但是，从实现的角度来看，这是很奇怪的……而且人们很容易混淆...

如果插件版本<3.2.0，则将下载v4支持的旧ArrayMap并将其放在FirebaseApp类的缓存中。

如果> 3.2.0，则使用androidx包中的ArrayMap。

将Firebase迁移到androidX的问题

2 个答案: